How to use

FileUtils

in

com.atlassian.plugin.util

public void start(final BundleContext context) throws Exception {
  bundleContext = context;
  final ServiceReference ref = context.getServiceReference(PackageAdmin.class.getName());
  packageAdmin = (PackageAdmin) context.getService(ref);
  context.addBundleListener(this);
  context.addFrameworkListener(this);
  loadHostComponents(registrar);
  if (null != frameworkBundlesUrl) {
    conditionallyExtractZipFile(frameworkBundlesUrl, frameworkBundlesDir);
  }
  installFrameworkBundles();
  // unregister the optional instrumentation service
  instrumentationServiceReference.ifPresent(ServiceRegistration::unregister);
  instrumentationServiceReference = Optional.empty();
  // register the instrumentation service if it's present, keeping aware that InstrumentRegistry might not be in the class loader
  final Optional instrumentRegistry = PluginSystemInstrumentation.instance().getInstrumentRegistry();
  if (instrumentRegistry.isPresent()) {
    instrumentationServiceReference = Optional.of(context.registerService(PluginSystemInstrumentation.INSTRUMENT_REGISTRY_CLASS, instrumentRegistry.get(), null));
  } else {
    instrumentationServiceReference = Optional.empty();
  }
}

private static Scanner buildZipScanner(final URL url, final File pluginPath) {
  // checkArgument used to preserve historical behaviour of throwing IllegalArgumentException
  checkArgument(null != url, "Bundled plugins url cannot be null");
  Scanner scanner = null;
  // Legacy behaviour - treat file:// urls as per buildSourceScanner, but we don't
  // want the error or the empty scanner.
  final File file = FileUtils.toFile(url);
  if (null != file) {
    scanner = buildScannerCommon(file);
  }
  if (null == scanner) {
    // Not handled by file:// urls, so it's a zip url
    com.atlassian.plugin.util.FileUtils.conditionallyExtractZipFile(url, pluginPath);
    scanner = new DirectoryScanner(pluginPath);
  }
  return scanner;
}